The Hirose DF40TB-10DS-0.4V(58) is a 10-position, 2-row receptacle from the DF40T series, designed for board-to-board mezzanine stacking at a tight 0.016" (0.40mm) pitch. It uses center strip contacts with gold flash plating (1.97µin) on the mating surface — fine for signal-level duty where the contact count drives the interconnect, not the current per pin.
What the 0.40mm Pitch and 1.5mm Stack Height Mean for Your Board
At 0.40mm pitch, this is a fine-pitch mezzanine connector — the board footprint needs a tight escape routing, typically with micro-vias or very narrow traces between pads. The 1.5mm mated stack height is the full board-to-board spacing once the receptacle is mated with its header; that dimension is non-negotiable for the enclosure's z-height budget. If the application sees frequent board swaps, step up to a heavier gold grade in the same series.
SMT Mounting and Solder Retention
Surface mount termination with a solder retention feature built into the part. The Tape & Reel packaging feeds into standard SMT lines.
How It Compares to Higher-Position Siblings
The DF40TB-10DS-0.4V(58) shares the same 0.40mm pitch, 1.5mm stack height, and gold flash plating with the 30-position DF40TC-30DS-0.4V(58), the 34-position DF40TC-34DS-0.4V(58), and the 40-position DF40TC-40DS-0.4V(58).